| Theme |
Monitoring Technologies in Dialysis Therapy |
| Title |
Arteriovenous pressure monitoring systems |
| Author |
Masami Oda |
Department of Urology, University of the Ryukyu / clinical engineer |
| Author |
Kimio Sugaya |
Department of Urology, University of the Ryukyu |
| Author |
Tadashi Hatano |
Department of Urology, University of the Ryukyu |
| Author |
Yoshihide Ogawa |
Department of Urology, University of the Ryukyu |
| [ Summary ] |
Arterial-side inflow, and venous-side pre-access pressure, along with dialysate fluid pressure provide us with various types of information during hemodialysis. A-V pressure gradients obtained from continuous, simultaneous monitoring of arterial and venous pressure seem to be useful indicators, but they are interfered with by the pulsatile noise produced by rotary blood pumps. To get rid of the noise, we took the changing average of A-V gradient data, allowing the pressure gradient to reflect the circulatory volume in patients. A-V gradient data correlated well with hematocrit data, monitored by using a CRIT-LINE system. Inparticular, A-V pressure gradient increased abruptly several minutes prior to hypotensive crises. Therefore, continuous A-V pressure gradient monitor seems to provide useful in formation in clinical settings. |